ADXL_LP.ino

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL345_U.h>
Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified(12345);
float val_x=0,val_y=0,val_z=0;
float sig_x=0,sig_y=0,sig_z=0;
float alpha=0.1;
void setup() 
{
  Serial.begin(115200);  
  if(!accel.begin())
  {
    Serial.println("Ooops, no ADXL345 detected ... Check your wiring!");
    while(1);
  }
  accel.setRange(ADXL345_RANGE_4_G);
}

void loop() 
{
  sensors_event_t event; 
  accel.getEvent(&event);
  val_x=(event.acceleration.x)/9.8;
  val_y=(event.acceleration.y)/9.8;
  val_z=(event.acceleration.z)/9.8;
  sig_x=(alpha*val_x)+((1.0-alpha)*sig_x);
  sig_y=(alpha*val_y)+((1.0-alpha)*sig_y);
  sig_z=(alpha*val_z)+((1.0-alpha)*sig_z);
  //Serial.print(sig_x); Serial.print(",");
  Serial.print(val_z); Serial.print(",");
  Serial.println(sig_z);
  delay(10);
}